Adjustable ring arm



FIG. 1 is a front top perspective view of an adjustable ring arm showing my new design.

FIG. 2 is a bottom perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a left side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines depict portions of the adjustable ring arm that form no part of the claimed design. 

CLAIM The ornamental design for an adjustable ring arm, as shown and described. 